namespace crypto {
namespace tink {

// Wraps a set of StreamingAead-instances that correspond to a keyset,
// and combines them into a single StreamingAead-primitive, that uses
// the provided instances, depending on the context:
//   * StreamingAead::NewEncryptingStream(...) uses the primary instance
//     from the set
//   * StreamingAead::NewDecryptingStream(...) uses the instance that matches
//     the ciphertext prefix.
class StreamingAeadWrapper
    : public PrimitiveWrapper<StreamingAead, StreamingAead> {
 public:
  // Returns a StreamingAead-primitive that uses StreamingAead-instances
  // provided in 'streaming_aead_set', which must be non-NULL and must contain
  // a primary instance.
  util::StatusOr<std::unique_ptr<StreamingAead>> Wrap(
      std::unique_ptr<PrimitiveSet<StreamingAead>> streaming_aead_set)
      const override;
};

}  // namespace tink
}  // namespace crypto

#endif  // TINK_STREAMINGAEAD_STREAMING_AEAD_WRAPPER_H_
